That is according to Ricardo Santos, who grew up alongside the former Manchester United star in Madeira.
Cristiano Ronaldo has been no stranger to tears over the years.
He wept when Portugal lost to Greece in the final of Euro 2004, where he was consoled by then manager Luiz Felipe Scolari.
And he also broke down when United won the Champions League final in 2008.
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Real Madrid star Cristiano Ronaldo used to be called "cry baby"
Cristiano Ronaldo cried when Portugal lost the Euro 2004 final
Arguably Ronaldo’s biggest crying display was when Portugal beat France to win Euro 2016 last summer.
But Santos claims the Real Madrid superstar used to shed tears for different reasons as a child.
"Cry-baby, yes, because Ronaldo already loved to win like he loves today,” Santos said.
Cristiano Ronaldo wept when Manchester United won the Champions League in 2008
"And when he lost and when other kids didn't pass the ball to him he used to cry."
Ronaldo’s fierce desire to win has led to him becoming one of the world’s most decorated players.
The 32-year-old has won 19 major trophies for club and country combined.
And he has also won the Ballon d’Or award on four separate occasions.